Pivot for horizontally swinging windows



Sept.'25, 1951 I s. E. LlDlN 2,569,109

v PIVOT FOR HORIZONTALLY SWINGING WINDOWS Filed June 15, 1945 2Sheets-Sheet 1 Sept. 25, 1951 Filed June 15, 1945 S. E. LlDlN PIVOT FORHORIZONTALLY SWINGING WINDOWS 2 Sheets Sh eet 2 sw gvgxe Patented Sept.25, 1951 UNITED STATES PATENT OFFICE 2,569,109 PIVOT FOR HORIZONTALLY.SWINGING WINDOWS Sigfrid. Emanuel Lidin, Stockholm, Sweden, as

signor to Aktiebolaget Atvidabei'gs Industrier, Atvidaherg, Sweden, acorporation of Sweden Application June 15, 1945, Serial No. 599,620 InSweden March 31, 1944 3 Gl'aims.

This invention relates to windows of the type in which at least onepane-carrying sash is pivoted in a stationary frame on horizontalpivots.

The provision of braking mechanismsfor the bearings of such windows isimportant for ease of manipulation of the window, but hitherto suchcombined braking and bearing devices were of a rather complicated andexpensive construction.

The present invention has for its object to produce a simple andinexpensive bearing and braking device for such windows, whereby thebrakingaction is attained in a simple and reliable manner avoidingcomplicated constructions.

A preferred embodiment of the invention is by way of example illustratedin the annexed drawing. In this embodiment the invention is shown asapplied to double windows, that is windows with double interconnectedsashes carrying dou- 'ble parallel glass panes.

I Fig. 1 is a side elevation of a portion of the stationary frametogether with the bearing and braking device according to the invention.

from the upper end in 4.

Fig. 6 is a vertical cross section on the line VI-VI in Fig. 5.

- Fig. '7 is a horizontal section of part of the structure shown in Fig.6, taken on the line VII-NIL of Fig. 6.

Referring now to the drawings, the reference 'numeral I indicates thestationary frame, 2 represents the outer sash. The innersash is composedof two suitably profiled members 3 and 3a rigidly interconnected.

The glass panes are indicated by 2 and 3'. The two sashes are coupledtogether in any well-known manner (not illustrated). Although only onevertical side of the stationary frame and sashes is shown it is evidentthat the arrangement at the other vertical side is made correspondingly.

A holding fittingA securely mounted on "the-stationaryframe l and aninclined slot 5 2 is provided'in an extension on said fitting, whichextension projects inwardly to the room. This slot is wedge-shaped .orbevelled in two perpendicular planes. Thus, the slot tapers from itsouter open end, inwardly towards the fitting and. the two lateral edgesare bevelled, as shown at 5a.

Another fitting 6 is securely mounted in the: inner sash 3, 3a. Thisfitting carries a cylindrical casing 1 which is integral with or rigidlyconnected with the fitting 6, for instance by means of welding. In thiscylindrical casing a cylindri-- cal body or journal 8 is rotatablymounted. The journal 8 has a radial flange So at one end and a.cylindrical disc 9 attached to the other end sur-- face by means ofscrews [8, so that the combined. rigid body 8, 9 has a. shape similar tothat of a. reel. On the body 8 a projection ltl is provided. which isshaped to fit in said slot 5. For this purpose the projection iswedge-shaped in two perpendicular planes. Thus, the two longitudinal. orlateral edges of the projection converge in one: direction and theprojection is bevelled on theselongitudinal edges, as shown at Illa, sothat the. longitudinal lateral surfaces are undercut, that. is groovedunder the edges.

In the circumferential cylindrical track I! of. the combined body 8, 9 acircularly bent plate: spring l2' and a brake shoe l3 shaped incorrespondence with the form of the track I I, are pro-- vided. Theplate spring is bent on a smaller radius than the bottom surface of thetrack Ii. Thus, the plate spring when mounted upon the journal 8, tendsto contract and thereby exerts a pressure on the bottom surface of thetrack I I. In the casing or bushing 'l a headless screw it is inserted,which screw projects into an aperture or recess in the brake shoe l3 andserves the purpose of holding the brake shoe against the body 8 with apressure adjustable by the setting of the screw I4. This screw alsoserves the purpose of preventing the journal 8 from leaving the casing Iin axial direction. The surfaces I5 of contact between the brake shoe l3and the spring I! at one end of the brakeshoe form a substantial anglewith the radius from the centre A, the end surface of the brake shoebeing chamfered in the direction such that its outer edge extendscircumferential-1y beyond its inner edge, whereas the surfaces 16 ofcontact between the brake shoe details of the device are in thepositions of rest,

as shown in the drawing. Now, if the window is opened by a swingingmotion around the horizontal axis A of rotation, the brake shoe I3, tobegin with, slides upon the higher part of the bottom of the track II.When the window is opened or closed, the stationary fitting 4 holds thecombined body 8, 9 against rotation, whereas the fitting 6, the casingI, and the brake shoe I3 as well as the spring l2 are turned. During theopening of the window this turnin motion occurs in a counter-clockwisedirection in Fig. 6, whereas during the closing of the window saidmotion occurs in the clockwise direction in Fig. 6. During the turningmotion in the counterclockwise direction the brake shoe I3 soon passesdownwardly into the recess I'I. Thereby the braking action issubstantially suspended or eliminated until the brake shoe again slidesup onto the higher part of the bottom of the track II at the oppositeend of the recess II. Thus, even after a small angle of rotation theopening of the window is effected substantially without braking. Thiscauses the pivoted sashes under the action of their own weight to occupya definite angle of inclination, determined by the recess II. From anesthetic point of view all of the windows on a house facade shouldautomatically be set in the same angular position when opened. Thisangular position is selected in such manner that the appropriate airinis obtained.

On account of the angle of inclination of the contact surface I5 it isvery easy to open the window, the spring I2 by means of the inclinedsurface I5 lifting the brake shoe from the bottom of the track II duringthe turning motion in counter-clockwise direction in Fig. 6. On thecontrary, when closing the window an increased braking action isobtained, the spring I2 by means of the inclined surface I6 holding thebrake shoe in contact with the bottom of the track II. This is importantbecause the window on account of the location of the center of gravityhas the tendency to fall back into closed position from slightly openedposition and, thus, a more efficient braking action is desirable for theclosing of the window than for the opening of the same. Moreover, thetwo interconnected sashes, tha

is, the outer sash 2 and the inner sash 3, 3a evidently can be lifteddirectly out from the stationary frame I without unfastening of screwsor the like, the braking device 6|8 then still bein carried by the sash.Because the projection It as well as the slot have a double wedge shape,that is, are bevelled or tapering in two different planes, theprojection IO will be exactly fixed and centered in all directions inthe slot5 of the stationary fitting 4. Thus, the frame and the sashesare held together and the seam between the frame and the sashes willbecome constant round the .whole perimeter of the window.

.V'Ihe particular shape of the p ojection; 10, and

4 the slot 5 also facilitates the mounting of the interconnected sashesinto the frame.

It should be observed that the screw H for adjusting the braking action,is arranged also to hold axially the journal and other loose details ofthe bearing. Thus, the mounting and detach-'- ing of the device can beperformed in a very simpleway.

What I claim is:

l. A pivot bearing for a window sash adapted to swing about a horizontalaxis in a stationary window frame, comprising, in combination, a firstfitting adapted to be secured to the stationary window frame and havingan open, bevelled slot, a second fitting adapted to be secured to theswingable window sash, a cylindrical casing on said second fitting, apivot member rotatably journalled in said casing and having acircumferential circular groove, a projection on said member, saidprojection being bevelled to fit in the slot in said first fitting, abrake shoe in the groove 'in said pivot member and having a recess, ascrew in said casing entering the recess in said brake shoe, and acircularly bent plate spring in the groove in said member, the ends ofsaid spring engaging the ends of said brake shoe so that said brake shoeand said spring together form a ring.

2. A pivot bearing for a window sash adapted to swing about a horizontalaxis in a stationary window frame, comprising, in combination, a firstfitting adapted to be secured to the stationary window frame and havingan upwardly extending open oblique slot bevelled in two perpendicularplanes, a second fitting adapted to be secured to the swingable sash, acylindrical casing on said second fitting, a, pivot member rotatablyjournalled in said casing, and having circumferential flanges forming acircular, circumferential groove between them, a projection on saidmember said projection being bevelled in two perpendicular planes to fitin the slot in said first fitting, a brake shoe in the shape of asegment of a ring in the groove between said flanges, said brake shoehaving a recess, a screw through said casing for entering the recess insaid brake shoe, and a plate spring in the shape of a segment of a ringin the groove between said flanges, the ends of said spring engaging theends of said brake shoe to form together with said brake shoe a ring,said member having along a part of its periphery between said flanges arecess, into which said brake shoe is able to enter in certain positionsof rotation relative to said member.

3. A pivot bearing for a window sash adapted to swing about a horizontalaxis in a stationary window frame, comprising, in combination, a firstfitting adapted to be secured to the stationary window frame and havingan upwardly extending open oblique slot bevelled in two perpendicularplanes, a second fitting adapted to be secured to the swingable sash, acylindrical casing on said second fitting, a pivot member rotatablyjournalled in said casing and provided with circumferential flangesforming a circular.

circumferential groove between them, a projection on said member, saidprojection being bevelled in two perpendicularplanes to fit in the slotin said first fitting, a brake shoe in the shape of a segmentof a ringin the groove between said flanges, said brake shoe having a recess, a

screw through saidcasingfor entering the recess in said brake shoe, anda plate spring in the :shape of a seemsntof a ring in the groove be.

of one end surface extending circumferentially 5 beyond the inner edgethereof, and the inner edge the other end surface extendingcircumferentialiy beyond the outer edge thereof.

SIGFRID EMANUEL LIDIN.

REFERENCES CITED The following references are of record in the file ofthis patent:

Number Number 6 UNITED STATES PATENTS Name Date Morgan Aug. 30, 1881Phinney Sept. 27, 1927 FOREIGN PATENTS Country Date Great Britain of1882 Great Britain Oct. 7, 1929 Great Britain Sept. 18, 1930

